模板继承
模板继承和类的继承含义是一样的，主要是为了提高代码重用，减轻开发人员的工作量
{% extends 'base.html' %}
base.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{% block title %} {% endblock %}</title>
{% block css %}
{% endblock %}
</head>
<body>
{% block content %}
{% endblock %}
{% block js %}
{% endblock %}
</body>
</html>
index.html
{% extends 'base.html' %}
{% block title %}
登录首页
{% endblock %}
{% block css %}
<style>
p{
color:red
}
</style>
{% endblock %}
{% block content %}
<P>姓名：<input type="text"></P>
<P>密码：<input type="text"></P>
{% endblock %}
{% block js %}
<script>alert('欢迎登录')</script>
{% endblock %}
if 、ifequal语句
{% if today_is_weekend %}
<p>Welcome to the weekend!</p>
{% else %}
<p>Get back to work.</p>
{% endif %}
{% ifequal user currentuser %}
<h1>Welcome!</h1>
{% endifequal %}
for循环
{% for athlete in athlete_list %}
<li>{{ athlete.name }}</li>
{{forloop.counter0}} #它是从0计数的
{{forloop.counter}} 它是从1计数的
{% if forloop.first %}<li class="first">{% else %}<li>{% endif %}
{% if forloop.last %}<li class="last">{% else %}<li>{% endif %}
{% endfor %}
注释标签
{% comment %}
This is a
multi‐line comment.
{% endcomment %}
include标签
允许在模板中包含其它的模板的内容
{% include "nav.html" %}
#使用关键字参数向模板传递额外的上下文
{% include "name_snippet.html" with person="Jane" greeting="Hello" %}
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